Air-cooling system for internal-combustion engines



June 4, 1929.

J. B. GABRIELSON AIR COOLING SYSTEM FOR INTERNAL COMBUSTION ENGINES Filed April 28 3 Sheets-Sheet lllllllllllll IIL flll'lllllll'Illlll-l June 4, 1929.

AIR COOLING SYSTEM FOR INTERNAL COMBUSTION ENGINES (l j a nlm- I J. B. GABRIELSON Filed April 28, 1928 '0 3 Shegts-Sheet 2 June 4,1929. J. B. GABRIELSON AIR COOLING SYSTEM FOR INTERNAL COMBUSTION ENGINES Filed April 28, 1928 Sheets-Sheet 3 Patented June 4, 1929.

UNITED STATES PATENT OFFICE.

JOHN BERNI-IARD' GABRIELSON, OF STOCKHOLM, SWEDEN.

AIR-COOLING SYSTEM FOR INTERNAL-COMBUSTION ENGINES.

Application filed April 28, 1928, Serial No. 273,640, and in- Sweden February 2, 1927.

This invention relates to air-cooling systems for internal combustion engines.

The object of the invention is to provide a cooling system of said kind especially adapted for use in connection with motors for automobiles, as it will give a sufficient cooling effect even in hot weather.

\Vith this object in view, the invention consists in the features of construction, combination and arrangement of parts as will be hereinafter fully described, reference be ing had to the accompanying drawings in which Fig. 1 is a side elevation, substantially diagrammatic, of a multiple cylinder internal combustion engine equipped with an aircooling device constructed in accordance with the present invention.

Fig. 2 is a top plan view of the engine, a portion of the jacket for the cylinder cover being shown in section.

Fig. 3 is a side elevation of the cylinder cover as seen from the side opposite to that shown in Fig. 1.

Fig. 4.- is a side elevation of a pair of cylinders with the jacket broken away.

Fig. 5 is a top plan view of said pair of cylinders with the iacket shown in section.

Referring more in detail to the drawings, 1 indicates generally a multiple cylinder -internal combustion engine, and 2 is the associated unitary cylinder cover structure.

The cylinders, two of which are shown at 3, 3 in Figs. 4 and 5, are surrounded by a common cooling jacket 4 and, likewise, the

cylinder cover structure 2 comprises a common cooling jacket 5.

Mounted at the front end of the engine is a fan blower 6 the shaft 7 of which is con- .nected to the engine shaft 8 by a conventional form of belt 9, whereby revoluble movement may be imparted to the fan blower 6. The fan blower 6 supplies air through the manifold 10 to the jacket of the cylinders, said manifold communicating with the cylinder jacket at one side thereof through two openings 11, 12 having their essential extension in the longitudinal direction of the engine. Provided in said manifold 10 between the two openings 11, 12 is means, as a damper 13, to control the flow of air to the opening 12 in order to uniformly distribute the air to the several cylinders. Said damper may be operated by a screw 14 or equivalent means.

The individual cylinders 3 within the common jacket 4 are provided with vertically extending heat radiating flanges 15 at opposite sides of the cylinder structure, as shown in Figs. 4 and 5. Between the individual cylinders spaces are left, as shown at 16 in Fig. 4, and extending into each of said spaces from both of the respective cylinders are horizontal heat radiating flanges 17. Said vertical flanges are interrupted so that each of them comprises a number of spaced portions. As shown, the portions of each flange are displaced relatively to those of the adjacent flange or flanges. Similarly, the horizontal flanges 17 of two adjacent cvlinders are displaced relatively to each other in vertical direction, as shown in Fig. 4.

Within the cylinder cover jacket 5 transversely extending heat radiating flanges 18 are provided, as shown in Figs. 2 and 3. The cooling jacket 5 of the cylinder cover communicates with the cooling jacket 4 of the cylinders through a row of holes 19 near that side where the manifold 10 is situated, a second row of holes 20 substantially at the middle portion of the cover, and a third row of holes 21 near the other side of the engine. At said last-mentioned side the cylinder cover jacket 5 is provided with outlet openings 22. v

The air supplied by the fan blower 6 enters the cylinder jacket 4 through the openings 11, 12. A portion of this air flows upwardly along that side of thecylinders facing the air entrance openings 11, 12, said air passing in the channels formed between the vertical flanges 15 while withdrawing heat from the latter. Another portion of the air passes through the-spaces 16 between the individual cylinders, withdrawing heat from the horizontal flanges 17. This air may, at the opposite side of the cylinders, enter between the vertical flanges 15 at said last-mentioned side due to the interruptions of said flanges. In this way the whole cylinder structure will be effectively cooled. The flanges do not only increase the heat radiating surface but do also effect a distribution of the cooling air with the result that, even at rather high temperature of the cooling air available, as in summer, a suffioient cooling will be secured.

From the cylinder jacket 1 the air flows up into the cylinder cover acket 5 through the holes 19, 20, 21. That portion of the air utilized to the lowest degree, that is, the amount of air entering through the holes 21 will pass along the flanges 18 on its way towards the outlets 22, and that air entering through the intermediate row of holes 20 will sweep around the tubes extending through the cover to cool them, as is readily seen from Fig. 2.

What I claim is:

1. In an air cooled internal combustion engine, the combination of a plurality of cylinders, a common air circulating jacket surrounding said cylinders, a fan blower arranged to be driven by the engine, a conduit leading from said fan blower to one side of said cylinder jacket, a common superstructure for all of said cylinders, said superstructure having an air circulating jacket, connections between said jackets, heat radiating flanges on the cylinders within said cylinder jacket, and heat radiating flanges in the jacket of said superstructure, said last mentioned jacket having discharge ports at one side.

2 In an air cooled internal combustion engine, the combination of a plurality of cylinders, a common air circulating jacket surrounding said cylinders, a fan blower mounted at one end of the engine, an inlet manifold leading from said fan blower along one side of said cylinder jacket, said manifold communicating with the cylinder jacket through a number of inlet ports, means provided in said manifold to control the admission of air to said inlet ports, a common superstructure for all of the cylinders, said superstructure comprising an air circulating chamber and connections between said chamber and the cylinder jacket, heat radiating flanges on the cylinders within the cylinder jacket, heat radiating flanges in said chamher, said chamber having discharge ports at the side opposite to that along which said manifold extends.

3. In an air cooled internal combustion engine, the combination of a plurality of cylinders mounted to form spaces between them, a common air circulating jacket surrounding said cylinders, said jacket having air inlet ports in one side, means to supply air to said jacket through said inlet ports, vertical heat radiating flanges at the opposite sides of the cylinders, horizontal heat radiating flanges extending from the cylinders into said spaces, a common superstructure for all of said cylinders, an air circulating chamber within said superstructiu-e, transversally extending heat radiating flanges on the bottom of said chamber, said superstructure having rows of ports communicating with the cylinder jacket and a row of air discharge ports in the side opposite to that at which said air inlet ports are situated.

4. In an air cooled internal combustion engine, the combination of a plurality of cylinders mounted to form spaces between them, a common air circulating jacket sur rounding said cylinders, said jacket having air inlet ports in one side, means to supply air to said jacket through said inlet ports, vertical rows of spaced heat radiating fins on oppositesides of said cylinders, the fins of each row being displaced in vertical direction relatively to the fins of adjacent rows, horizontal heat radiating flanges alternately extending from the cylinders into each of said spaces, a common superstructure for all of said cylinders, an air circulating chamber within said superstructure, t 'ansversally extending heat radiating flanges on the bot tom of said chamber, said superstructure having rows of ports con'lmunicating with the cylinder jacket and a row of air discharge ports in the side opposite to that at which said air inlet ports are situated.

5. I11 an air cooled internal combustion engine, the combination of a plurality of cylinders, a common air circulating jacket surrounding said cylinders. said jacket having air inlet ports in one side, a fan blower mounted at one end of the engine, means to impart motion from the engine to said fan blower, a manifold connecting the pressure side of said fan blower to said inlet ports, means in said manifold to control the flow of air to said ports, heat radiating flanges on the cylinders within said jacket, a common superstructure for all of said cylinders, an air circulating chamber in said superstucture, heat radiating flanges in said chamher, a row of connecting ports between said jacket and said chamber near each side of the engine, an intermediate row of similar connecting ports, and a row of air discharge ports at the side of said chamber opposite to that at which said inlet ports are situated.

In testimony whereof I have signed my name.

JOHN BERNI-IARD GABRIELSON. 

